US 12,359,523 B2
Wellhead attachment system
Knox Wright, Houston, TX (US); Jason Meyer Armistead, Houston, TX (US); Khang Van Nguyen, Tomball, TX (US); and Andrew Browne Helvenston, Houston, TX (US)
Assigned to VAULT PRESSURE CONTROL, LLC, Houston, TX (US)
Filed by Vault Pressure Control, LLC, Houston, TX (US)
Filed on Feb. 12, 2024, as Appl. No. 18/439,250.
Application 18/439,250 is a continuation in part of application No. 18/149,886, filed on Jan. 4, 2023.
Claims priority of provisional application 63/296,328, filed on Jan. 4, 2022.
Prior Publication US 2024/0183242 A1, Jun. 6, 2024
Int. Cl. E21B 17/08 (2006.01); E21B 33/04 (2006.01)
CPC E21B 33/04 (2013.01) [E21B 17/085 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A casing system, comprising:
a landing ring defining an opening extending between a first end portion and a second end portion, wherein the first end portion is configured to couple to a conductor pipe, the landing ring comprising a landing ring shoulder extending radially inward from an inner surface of the opening;
a mandrel hanger comprising a threaded outer surface;
a load ring comprising:
an upper radial surface;
an outer surface configured to engage with the landing ring shoulder; and
a threaded inner surface configured to engage with the threaded outer surface of the mandrel hanger;
an engagement ring comprising:
a lower radial surface configured to abut the upper radial surface of the load ring; and
a threaded inner surface configured to engage with the threaded outer surface of the mandrel hanger.